L ogic

1) A Man was born in the first half of nineteenth century was x years old in the year x^2. He was born in

a) 1806         b) 1836            c) 1812               d) 1825

2)A three digit number has, from left to right , the digits h,t & u with h > u . When the number with the digits reversed is substracted from the original number , the unit's digit in the difference is 4. The next two digits , from the right to the left , are :
a) 5 & 9    b) 9 & 5    c) 5 & 4      d) 4 & 5

3) A merchant bought some goods at a discount of 20% of the list price . He wants to mark them at such a price that he can give a discount of 20% of the marked price and still make a profit of 20% of the  selling price. The percent of the list price of which he should mark them is :
a) 20       b) 100        c) 125          d) 80

4) A taxi travelling at a uniform speed . The driver sees a milestone showing a 2 - digit number. After travelling for an hour the driver sees another milestone with the same digits in the reverse order.After anothe hour the driver sees another milestone containing three digits and with the same two digits included .The average speed of the taxi is
a) 45km/hr   b) 36 km/hr  c) 54 km/hr   d) 42 km/hr

100

Start the sequence with non zero digits so that the result of desired arithmetic operation is zero.

12+3-4+5+67+8+9=100

123+4-5+67-89=100
other cases

1=148 / 296 + 35/70

100 = 33 X 3 +3/3


1+2+34-5+67+89-8+9=100

12+3-4+5+67+8+9=100

123-4-5-6-7+8-9=100

1+2.3-4+5+6.7+89=100
and many more