NOTE: Answers to all questions are given at the end of this exercise. Question No. 1: Estimate mentally the following: (a) 41² (b) 58² (c) 112² (d) 32³ (e) 39³ (f) 98³ (g) 198² (h) 301³ Question No. 2: Give an estimate of each of the following mentally: (a) √37 (b) ³√26 (c) √63 (d) ³√124 (e) √84 (f) √142 (g) ³√1004 (h) √897 Question No. 3: (a) 26² (b) 37² (c) 78² (d) 99² (e) 123² (f) 13³ (g) 29³ (h) 34³ (i) 643³ (j) 109³ (k) √961 (l) √2209 (m) √3481 (n) √11236 (o) √69169 (p) ³√4096 (q) ³√68921 (r) ³√314432 (s) ³√753571 (t) ³√1906624 (u) 18² + 11³ - √484 + ³√4913 (v) √676 x 9³ – 17² + √2704 (w) 24³ ÷ √4096 + ³√512 x 44² (x) ³√1331 x √2916 – 42³ ...

## Exercise No. 1E

NOTE: Answers to all questions are given at the end of this exercise. Question No. 1: Find all the perfect squares that are between 50 and 150. Question No. 2: Copy the following numbers and circle those that are perfect squares: 8, 16, 18, 25, 33, 49, 50, 72, 81, 100, 1, 125, 144, 200, 169, 111, 225, 400 Question No. ...

## Exercise No. 1D

NOTE: Answers to all questions are given at the end of this exercise. Question No. 1: Find the LCM of each of the following numbers. (a) 3 and 7 (b) 6 and 9 (c) 7 and 21 (d) 12 and 9 (e) 24 and 18 (f) 65 and 135 (g) 100 and 75 (h) 144 and 36 (i) 250 and 125 (j) 63 and 490 Question No. 2: Find ...

## Exercise No. 1C

NOTE: Answers to all questions are given at the end of this exercise. Question No. 1: Find all the common factors of: (a) 6 and 9 (b) 15 and 18 (c) 27 and 36 (d) 30 and 45 Question No. 2: Find the HCF of the following: (a) 12 and 30 (b) 15 and 75 (c) 16 and 40 (d) 24 and 64 (e) 24 and 108 (f) 28 and ...