51 + 52 + 53 + ...........+ 100

= (1 + 2 + 3 + .... + 100) - (! + 2 + 3 + ...... + 50)

=

= (5050 - 1275) = 3775

A) 7 | B) 9 |

C) 11 | D) 5 |

Explanation:

LCM of 2, 3, 7 is 42.

=> (700 – 300)/42 = 9 22/42 => 9 Numbers.

A) 138 to 164 | B) 125 to 147 |

C) 148 to 158 | D) 152 to 164 |

Explanation:

A+7B=112

it is clear that A = 14, then it becomes A>=B, but A is smallest angle) given

so, range of A is 0.0001 to 13.9999 ( I am taking upto 4 decimal places)

so, range of B becomes 14 to 16 ( after rounding off to 4 decimal places)

so, range of C becomes 152 to 164 ( after rounding off to 4 decimal places)

A) 788 | B) 786 |

C) 784 | D) 792 |

Explanation:

(kx22)/100 = 340 - 166.64 = 173.36

k = (173.36 x 100)/22

k = 788

A) 28 | B) 19 |

C) 37 | D) 46 |

Explanation:

Let the original number is 82 i.e 8 + 2 = 10 and when the digits are reversed i.e 28

The difference is 82 - 28 = 54 i.e, the number is decreased by 54.

A) 40 | B) 45 |

C) 32 | D) 30 |

Explanation:

Probability of left handed = 4/5

total student = 40

total left handed = 40 x(4/5)

= 32