# This No-Calculator Math Test Is Stumping People With A PhD

## One person's constant is another person's variable

Created by Cody Cross
On Sep 6, 2020

Even people with a PhD cannot get a perfect score in this tricky, strictly no-calculator math drill. Can you score at least 15/25? Give it a shot, and let us know how well you did.

1 / 25

John is taller than Jon, and Jane is shorter than John. Which is accurate?

2 / 25

What comes next in the series:
24, 23, 21, 18, 14, __

3 / 25

What is the square root of 225?

4 / 25

Which is divisible by 4 without a remainder?

5 / 25

Lucy, 12 years old, is three times as old as Kim. How old will she be when she's twice as old as Kim?

6 / 25

I have figs. I eat 1 and give half the remainder to Rob. I eat another, and throw half of what's left away. I now have 5 figs. I started with...

7 / 25

8 + 8 ÷ 8 + 8 x 8 – 8 = ?

8 / 25

I bought lunch for 3 friends. If I spent \$30 and had to pay a 15% tip, what was the tip?

9 / 25

My grandson weighs 44 pounds plus half his own weight. How much does he weigh?

10 / 25

If X is bigger than Y but smaller than Z, then:

11 / 25

Pick 3 different numbers whose product and sum always give the same answer

12 / 25

Eric's salary is \$2000 more than Rachel's. Together they make \$5800. Rachel makes...

13 / 25

A plane flew for 4 hours AGAINST a 10 mph wind. It then flew for 3 hours WITH the same wind. The plane flew 3560 miles. Find the rate of the plane in still air.

14 / 25

When you add the square root of 81 to 12 squared, what do you get?

15 / 25

1 + 1 × ¼ + 1 − 1 = ?

16 / 25

Ron was 0.3 of his father's age this year. If he's 12 this year, how old was his father when he was born?

17 / 25

When I get multiplied by any number, the sum of the figures in the product is always me.
What am I?

18 / 25

Which is divisible by 7 without a remainder?

19 / 25

Which number is equal to the quarter of its square?

20 / 25

During a 5-day festival, the number of visitors tripled each day. If the festival opened on a Thursday with 345 visitors, what was the attendance on Sunday?

21 / 25

The average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number?

22 / 25

You reduce the price of a product by 20%. What percentage of the reduced price must you increase to put the product back to its original price?

23 / 25

Which number doesn't belong in the following series:
0, 1, 2, 4, 9, 16

24 / 25

Simon bought a boat for \$6300. He then sold it for 15% profit. How much money did he sell the boat for?

25 / 25

10 x 0.25 = ?

25
Questions left

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