Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 7.5 4 15 5 7.5 4 15 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
Number System 56.21 +2.36+5.41 —21.4+1.5=? 64.08 34.08 54.08 44.08 64.08 34.08 54.08 44.08 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 44.08
Number System How many of the following numbers are divisible by 132? 264, 396, 462, 792, 968, 2178, 5184, 6336 5 6 4 7 5 6 4 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 132 = 11 * 3 * 4Clearly, 968 is not divisible by 3None of 462 and 2178 is divisible by 4And, 5284 is not divisible by 11Each one of the remaining four numbers is divisible by each one of 4, 3 and 11.So, there are 4 such numbers.
Number System √2304 x √? = 2832 3381 3681 3581 3481 3381 3681 3581 3481 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √2304 x √? = 2832= 48 x √? = 2832= √? = 2832/48 = 59∴? = 59 x 59 = 3481
Number System In how many different ways can the letters of word "COLLEGE" be arranged ? 1260 1240 1300 1280 1260 1240 1300 1280 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 7!/2!2! = 1260(∵ L and E come twice)
Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 920 712 824 625 920 712 824 625 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
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