11.Find the next number of the series 15,35,77..... A) 143 B) 134 C) 105 D) 95 View Answer Report DiscussAnswer: Option AExplanation:$15=3\times5$ $35=5\times7$ $77=7\times11$ So, the next number should be product of 11 & 13 is 143.
12.Find the next number in the series 9,25,49,121.... A) 131 B) 139 C) 113 D) 169 View Answer Report DiscussAnswer: Option DExplanation:Square root of prime numbers respectively.So, next number should be $13^{2}=169$
13.Find the next number in the series 3,5,7,11,13.... A) 17 B) 21 C) 23 D) 25 View Answer Report DiscussAnswer: Option AExplanation:Prime number series.
14.Find the next number of he series 2,9,28,65.... A) 125 B) 128 C) 126 D) 132 View Answer Report DiscussAnswer: Option CExplanation:$2= 1^{3}+1$ $8= 2^{3}+1$ $15= 3^{3}+1$ $24= 4^{3}+1$ So, next should be $5^{3}+1=126$
15.Find the next numbre of the series 1,8,27,64... A) 69 B) 83 C) 125 D) 126 View Answer Report DiscussAnswer: Option CExplanation:The given series are the cube root of 1,2,3,4 so next should be $5^{3}=125$
