A competition or two for Maths Club members

FIND THE MISSING DIGITS

When doing multiplication & division remember when you change the side you change the sign!

 

a. ? x 7 = 490 ( clue 490 divide by 7)

b. 2? x 7 = 147

c. ?1 x 5= 105

d. ?? x 5= 55

e. 5? x 3 = 153

f. 6? x 6 = 378

g. 2? divided by 2 = 14

h.76? divided by 2 = 381

 

FIND N!

 

i. 6 + n = 12

j. 52 x n = 416

k. 34 - n = 8

l. 2n = 12

m 3n - 1 = 19

n. 3n + 5 = 17

o. 4n - 3 = 13

 

GOOD LUCK!!

 

Previous weeks work:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

 

MISSING NUMBERS

 

In this example 5 x 5 x 5 makes 125

 

In each of these questions the missing numbers are the same!

 

You can use a calculator.

 

1. ? x ? = 196

2. ? x ? x ? = 512

3. ? x ? x ? = 27

4. ? x ? x ? = 2744

5. ? x ? x ? = 9261

6. ? x ? x ? = 531.441

7. ? x ? x ? = 10.646

8. ? x ? x ? = 3.375

9. ? x ? x ? = 0.512

10. ? x ? x ? = 1.157625

 

Answers to Mr Reed as soon as possible.