Let’s Get Quizzical: Maths

Looking for something to do this weekend? Don’t worry, we’ve got you sorted. Put your best Quizmaster hat on, set up a Zoom a FaceTime with your mates, and get quizzing! Add this round to a longer quiz, or just keep it short and sweet. This one’s all about Maths...answers at the bottom.

QUESTIONS

1. I am an odd number. Take away one letter and I become even. What number am I?

a) 7

b) 3

c) 9

d) 6

2. If 9999 = 4, 8888 = 8, 1816 = 6, 1212 = 0, then 1919 =

a) 8

b) 6

c) 4

d) 2

3. Divide 30 by ½ and add 10. What’s the answer?

a) 25

b) 40

c) 35

d) 70

4. Sally is 54 years old and her mother is 80. How many years ago was Sally’s mother three times her age?

a) 41

b) 12

c) 7

d) 30

5. What is the next number in the series: 2, 9, 30, 93, …?

a) 99

b) 282

c) 109

d) 239

6. True or false: a googol is bigger than a billion.

a) True

b) False

7. What number should follow in this sequence: 1=4, 2=16, 3=64, 4=?

a) 104

b) 116

c) 164

d) 256

8. 6, 28, 496, and 8128 are examples of what?

a) Rational numbers

b) Prime numbers

c) Perfect numbers

d) Transfinite numbers

9. Which Greek mathematician is often referred to as the 'father of geometry'?

a) Pythagoras

b) Euclid

c) Archimedes

d) Diophantus

10. What does D represent in Roman numeral system?

a) 500

b) 100

c) 1000

d) 50

 

 

ANSWERS

1. The answer is a) 7!

When you take away the ’s’ from the word ‘seven…it becomes ‘even’!

2. The answer is c) 4!

9999 has four ‘closed areas’ (the top of the ‘9’)

8888 has eight closed areas (the tops and bottoms of the 8’s and there are no other digits)

1816 has three closed areas (top and bottom of 8 and bottom of six) and there are two other digits (3x2=6)

1212 has no closed areas (0x4=0)

SO, 1919 has two closed areas (the top of 9’s) and two other digits. So, 2x2 = 4!

3. The answer is d) 70!

You’re dividing 30 by half, not two. Thirty divided by half is the same thing as multiplying it by two, which makes 60. Add another 10 and that’s 70.

4. The answer is a) 41!

When Sally was 13, her mother was 39.

5. The answer is b) 282!

Multiply the previous number by three and then add three.

6. The answer is True!

A googol is the label for 10 to the hundredth power (10100), or 1 followed by 100 zeros. 

7. The answer is d) 256!

The answers are to the power of their placement in sequence. 41 = 4. 42 = 16. 43 = 64. 44 = 256.

8. The answer is c) Perfect numbers!

A perfect number is a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of its divisors 1, 2, and 3.

9. The answer is b) Euclid!

Well, his name has it all, which in Greek means “renowned, glorious”. He worked his entire life in the field of mathematics and made revolutionary contributions to geometry.

10. The answer is a) 500!

In Roman Numerals, I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, and M = 1000!