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Page 23<br />
1) 2021 2) 624 3) 4216 4) 221 5) 3009<br />
6) 5621<br />
Page 24<br />
1) 7 2) 7 3) 6 4) 8 5) 8<br />
Page 25<br />
1) 4 2) 2 3) 5 4) 9 5) 4 6) 4<br />
Page 27<br />
1) 7-branch 2) 4-branch 3) 6-branch 4) 1-branch<br />
Page 29<br />
3 is wrong as 5 + 6 does not equal 3 in digit sums<br />
and 5 is wrong as 6 + 6 does not equal 2.<br />
Page 30<br />
1) 78 2) 89 3) 888<br />
www.classtopper.com<br />
ANSWERS<br />
Page 31<br />
1) 121 2) 173 3) 66 4) 121 5) 726<br />
6) 15 156 = 1656 7) 3 14 14 = 454<br />
Page 33<br />
1) 26 2) 36 3) 44 4) 27 5) 27<br />
49
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