Math Jeopardy

Math Riddles

100

How do you make the number 7 an even number without addition, subtraction, multiplication or division?

Answer: Drop “S” in the Spelling Seven.

200

What can you put between a 5 and a 6 so that the result is greater than a five but less than a six?

point (.)

Explanation:  

5.6 is greater than 5 but less than 6

300

I am a number. I have 7 in the ones place. I am less than 80 but greater than 70. What is my number?

77

Explanation:

77 is less than 80 and greater than 70. 

400

My brother lives at the reverse of my house number. The difference between our house numbers ends in two. What are the lowest possible numbers of our house numbers?  

The lowest possible numbers for the houses are 19 and 91. The difference is 72.

500

If 9999 = 4, 8888 = 8, 1618 = 6, 1232 = 0, then 1783 =

6

Explanation:

• 9999 has 4 closed areas (the top of the '9').
• 8888 has 8 closed areas, the top and bottom parts of the 8 and there are no other digits.
• 1618 has 3 closed areas, (bottom of 6 and top and bottom of 8, and it has 2 other digits (3 x 2 = 6)).
• 1232 has 0 closed areas, (0 x 4 = 0)
• 1783 has 2 enclosed areas and 3 other digits. So 2 x 3 = 6

Random

100

If the day tomorrow is Sunday, what was it yesterday?

Friday

200

7y+(-14)=28

What is y?

y=6

Solution:

7y-14=28

7y=28+14

7y=42

y=42/7

y=6

300

You are given a telephone and asked to multiply all the numbers on the telephone number pad. What will be the answer? 

Zero (As the number pad contains number 0. When you multiply any number by zero, the answer will be zero).

400

What’s the maximum number of times you can subtract five from 25?

Answer: Only once. This is because when you subtract five the first time, 25 becomes 20, then 15, and so on. So, it is no longer 25.

500

A clock strikes once at 1 o’clock, twice at 2 o’clock, thrice at 3 o’clock and so on. How many times will it strike in 24 hours? 

A. 78
 B. 136
 C. 156
 D. 196

C. 156

Solution:

78 x2 = 156

Mental Math

100

1⁰ is equal to ………….

1

200

3a =12 

What is a? 

4

300

6 + (27 x 2) = ?

60

400

26 x 2 = 

52

500

-(28-33)²=?

-25

Word Problems

100

The school cafeteria served 356 lunches on Monday and 379 lunches on Tuesday. How many lunches did the cafeteria serve on both days combined?

735

200

Christian read 4/5 of a story book which has 100 pages. How many pages of the book is not yet read by Christian?

20 pages

300

Valerie has to learn 15 new steps for the show.
She learned 5 last week and 4 this week.
How many more steps does Valerie need to learn?

6

400

If David’s age is 27 years old in 2011. What was his age in 2003?

27-8=19

500

Average of three person’s age is 9 years. Find the sum of their age.

9 x 3 = 27

General Knowledge

100

Which is the only number that cannot be used as a divisor?

zero

200

The total number of dots on a dice.

21

300

What is the other name of the Perimeter of a Circle?

Circumference

400

Father of Mathematics

Archimedes

500

It is the  “Fear of Numbers”?

Numerophobia or arithmophobia