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Y3/4-Sum-Instructions for Child-Week 1 (Y4) © Hamilton Trust

The last digit is 1, 3, 5, 7 or 9

1. Use these clues to work out Magical Molly’s mystery four-digit number.

My number is odd. Three of the digits are even. My number rounds to 2500 (to the nearest 100). The four digits add up to 17. The third digit is two more than the second digit. What‛s my number?

2. Now try and work out this mystery Roman number.

My number has VII Roman letters in it. My number rounds down to CCXXX (nearest X) My number has IV different Roman letters in it. What‛s my number?

Challenge

Choose your own mystery four-digit number or Roman number. See if you can write a set of clues which makes it possible for another child/pair to work out your mystery number.

Guess my number

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Y3/4-Sum-Instructions for Child-Week 1 © Hamilton Trust

1 I 11 XI 30 XXX

2 II 12 XII 40 XL

3 III 13 XIII 50 L

4 IV 14 XIV 60 LX

5 V 15 XV 70 LXX

6 VI 16 XVI 80 LXXX

7 VII 17 XVII 90 XC

8 VIII 18 XVIII 100 C

9 IX 19 XIX 200 CC

10 X 20 XX 300 CCC