100+ Arithmetic riddles

What comes next in the sequence? 2, 4, 8, 16, ?
Answer: 32
If you have 5 apples and you give away 3, how many do you have left?
Answer: 2
What is the result of 7 multiplied by 3, divided by 2?
Answer: 10.5
If you add 15 to half of 50, what do you get?
Answer: 40
What number can be added to 9 to make it equal to 3 times 4?
Answer: 3
What is the square root of 144?
Answer: 12
If a dozen eggs cost $2.40, how much does one egg cost?
Answer: $0.20
What is the next prime number after 17?
Answer: 19
What is 20% of 150?
Answer: 30
If you divide 100 by half and add 10, what is the result?
Answer: 210
What is the product of 9 and its reciprocal?
Answer: 1
How many sides does a decagon have?
Answer: 10
If you subtract 25 from 100, what is the remainder?
Answer: 75
What is the value of ‘x’ in the equation 3x – 7 = 8?
Answer: 5
What is the smallest composite number?
Answer: 4
If you have 4 quarters and 3 dimes, how much money do you have?
Answer: $1.15
What is the sum of the first 10 natural numbers?
Answer: 55
How many degrees are in a right angle?
Answer: 90
What is the cube of 3?
Answer: 27
If a book has 300 pages and you read 30 pages a day, how many days will it take to finish the book?
Answer: 10

What is the sum of 8 and twice the difference between 5 and 3?
If you have 15 apples and give away half of them, how many apples do you have left?
What is the product of 7 and the square root of 9?
If a pizza is divided into 8 equal slices and you eat 3 slices, what fraction of the pizza did you eat?
What is the result when you subtract 20 from the double of 15?
If you have $50 and spend two-thirds of it, how much money do you have left?
What is the quotient when 72 is divided by 8?
If a book has 300 pages and you read one-third of it, how many pages did you read?
What is the sum of the first 10 positive even numbers?
If you have 24 candies and distribute them equally among 6 friends, how many candies does each friend get?
What is the difference between the product of 6 and 4 and the quotient of 36 divided by 3?
If you travel at a speed of 60 miles per hour, how far will you travel in 2.5 hours?
What is the result when you add 5 to one-third of 39?
If a box contains 24 pencils and you take away 2-thirds of them, how many pencils are left?
What is the product of 9 and the difference between 7 and 3?
If a marathon is 26.2 miles long and you have completed two-thirds of it, how many miles have you run?
What is the sum of the first 5 prime numbers?
If a rectangle has a length of 10 units and a width of 5 units, what is its perimeter?
What is the result when you subtract one-half of 30 from 20?
If a train travels at a speed of 80 kilometers per hour for 3 hours, how far does it travel?

Another Arithmetic riddles

If you subtract 7 from a number and then multiply by 5, the result is 40. What is the number?
Answer: 9
What is the sum of the first 4 prime numbers?
Answer: 17
If you divide 81 by 9, what is the quotient?
Answer: 9
What is the difference between 10 times 4 and 8 times 5?
Answer: 0
What is the product of 6 and the cube root of 64?
Answer: 36
If a pizza is cut into 8 equal slices and you eat 3 slices, what fraction of the pizza have you eaten?
Answer: 3/8
What is the value of ‘z’ in the equation 5z – 7 = 18?
Answer: 5
How many times does 4 go into 36?
Answer: 9
If you add 20% of 50 to 30, what is the result?
Answer: 40
What is the next number in the sequence? 2, 6, 12, 20, ?
Answer: 30
If you subtract 9 from 27 and then divide by 6, what is the result?
Answer: 3
What is the value of ‘y’ in the equation 3y + 4 = 19?
Answer: 5
If you double a number and subtract 12, the result is 18. What is the number?
Answer: 15
What is the sum of the first 6 odd numbers?
Answer: 36
How many sides does a nonagon have?
Answer: 9
What is the product of 9 and its reciprocal?
Answer: 1
If a book has 400 pages and you read 40 pages a day, how many days will it take to finish the book?
Answer: 10
What is the next number in the sequence? 1, 4, 9, 16, ?
Answer: 25
How many degrees are in a quadrilateral?
Answer: 360
What is the sum of the digits in 9876?
Answer: 30

If you add 8 to a number and then multiply by 4, the result is 52. What is the number?
Answer: 11
What is the sum of the first 5 multiples of 7?
Answer: 175
If you divide 100 by 5, what is the quotient?
Answer: 20
What is the difference between 9 squared and 7 squared?
Answer: 40
What is the product of 5 and the square root of 100?
Answer: 50
If a movie ticket costs $12 and you have $50, how many tickets can you buy?
Answer: 4
What is the value of ‘x’ in the equation 6x – 9 = 27?
Answer: 6
How many times does 3 go into 27?
Answer: 9
If you add 25% of 80 to 40, what is the result?
Answer: 50
What is the next number in the sequence? 3, 9, 18, 30, ?
Answer: 45
If you subtract 12 from 36 and then divide by 6, what is the result?
Answer: 4
What is the value of ‘y’ in the equation 4y + 7 = 31?
Answer: 6
If you triple a number and subtract 15, the result is 24. What is the number?
Answer: 13
What is the sum of the first 7 prime numbers?
Answer: 58
How many sides does a dodecagon have?
Answer: 12
What is the product of 8 and its reciprocal?
Answer: 1
If a book has 500 pages and you read 50 pages a day, how many days will it take to finish the book?
Answer: 10
What is the next number in the sequence? 2, 8, 16, 26, ?
Answer: 38
How many degrees are in a hexagon?
Answer: 720
What is the sum of the digits in 8765?
Answer: 26

If you add 10 to a number and then double it, the result is 46. What is the number?
Answer: 18
What is the sum of the first 6 multiples of 9?
Answer: 234
If you divide 81 by 9, what is the quotient?
Answer: 9
What is the difference between 10 cubed and 8 cubed?
Answer: 488
What is the product of 7 and the square root of 121?
Answer: 77
If a concert ticket costs $50 and you have $200, how many tickets can you buy?
Answer: 4
What is the value of ‘x’ in the equation 7x – 14 = 35?
Answer: 7
How many times does 5 go into 50?
Answer: 10
If you add 30% of 70 to 50, what is the result?
Answer: 71
What is the next number in the sequence? 4, 12, 24, 40, ?
Answer: 60
If you subtract 15 from 45 and then divide by 5, what is the result?
Answer: 6
What is the value of ‘y’ in the equation 5y + 10 = 35?
Answer: 5
If you double a number and subtract 18, the result is 24. What is the number?
Answer: 21
What is the sum of the first 8 prime numbers?
Answer: 59
How many sides does a hendecagon have?
Answer: 11
What is the product of 10 and its reciprocal?
Answer: 1
If a book has 600 pages and you read 60 pages a day, how many days will it take to finish the book?
Answer: 10
What is the next number in the sequence? 3, 10, 18, 27, ?
Answer: 37
How many degrees are in a pentagon?
Answer: 540
What is the sum of the digits in 9876?
Answer: 30

Table of Contents