Number System Find the least number which when divided by 35 and 11 leaves a remainder of 1 in each case. 391 384 388 386 391 384 388 386 ANSWER DOWNLOAD EXAMIANS APP
Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 382 343 378 396 382 343 378 396 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System 7.8 x 4.5 x 4.2/0.14 = ? 1053 1032 1012 1087 1053 1032 1012 1087 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7.8 x 4.5 x 4.2/0.14 = 1053
Number System If a + b = 16 and ab = 68, what is the value of a² + b² ? 120 124 112 116 120 124 112 116 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP a + b = 16 Therefore, (a+b)² = (16)² = 256 a² + b² + 2ab = 256Therefore, a² + b² = 256 - 2 x 68Therefore, a² + b² = 256 - 136 = 120
Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 6 5 10 4 6 5 10 4 ANSWER DOWNLOAD EXAMIANS APP
Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? None 6 2 4 None 6 2 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4
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