Number System If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ? 13 15 11 17 13 15 11 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² + (35)² = 1394Therefore, x² = 1394 - (35)² = 1394 - 1225 = 169Therefore, x = √169 = 13
Number System In how many different ways can the letters of word 'BIOLOGY' be arranged ? 2410 2520 2678 2367 2410 2520 2678 2367 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In BIOLOGY total 7 letters are there but O comes twice.∴ Number of arrangements = 7!/2! = 2520
Number System What is the sum of the local values of the digits 2, 3, 4, 5 in the number 2345? 2345 2105 5243 2435 2345 2105 5243 2435 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2000 + 300 + 40 + 5 = 2345
Number System Supply the missing figure : 3, 11, 8, 16, 13 .... 18 18 21 28 12 18 21 28 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 24 21 84 42 24 21 84 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
Number System Two third of three- fifth of one fourth of a number is 24, what is 30% of that number? 42 72 90 69 42 72 90 69 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 2/3 * 3/5 * 1/4 = 24x = 240240 * 30/100 = 72
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