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Start learning 50% faster. Sign in nowLet the number of books on History, Polity and Geography be x, y and z respectively. Given, (x + y + z)/3 = 180 Or, x + y + z = 540 ….. (1) And, (x + z)/2 = 150 Or, x + z = 300 ….. (2) From equation 1 and 2 Number of books on polity = y = 240 Number of books on geography = 0.8 × 240 = 192 Therefore, number of books on history = 540 – (240 + 192) = 108
If 32x + 1– 3x= 3x + 3– 32, then values of x are:
(560 ÷ 32) × (720 ÷ 48) = ?
72% of 486 – 64% of 261 = ?
56 × 18 + ? × 21 – 49 × 12 = 63 × 26
√4096 + √3249 = (?)2
125% of 80 – 6 × 4 = ? × 13 – 54
((1024)n/5 × (42n+1 ))/(16n × 4n-1 ) = ?