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Write true of false. i) 15 : 30 :: 30 : ...

Write true of false. i) 15 : 30 :: 30 : 40, ii) 22 : 11 :: 12 : 6, iii) 90 : 30 :: 36 : 12, iv) 30 : 64 :: 6 : 12, v) 25 : 1 :: 40 : 160.

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Write true or false. i) 15 : 30 :: 30 : 40, ii) 22 : 11 :: 12 : 6.

Write true or false : 15:30: : 30:40

Write true or false : 90:30: : 36:12

Write true or false : 22:11: :12:6

Write true or false : 25:1: : 40:160

Write true or false : 32:64 : :6:12

Find the modes of the following data. i) 5, 6, 3, 5, 4, 9, 5, 6, 4, 9, 5 ii) 25, 14, 18, 15, 17, 16, 19, 13, 12, 24 iii) 10, 15, 20, 15, 20, IO, 15, 20, 10

Find three different solutions of the each of the following equations. (i) 3x + 4y = 7 (ii) y = 6x (iii) 2x - y = 7 (iv) 13x - 12y = 25 (v) 10x + 11y = 21 (vi) x + y = 0

Find LCM of: i. 3, 4 ii. 10, 11 iii. 5, 6, 7 iv. 10, 30 v. 4, 12, 24 vi. 3, 12 What do you observe ?

Write down the number of significant figures in the following. (i) 0.007 " " (ii) 2.64 xx 10^(24) " " (iii) 0.2390 (iv) 6.320 " " (v) 6.032 " " (vi) 0.0006032