(21) . 254 x ? x 8 = 95504
(22) . 2567 รท 17 x 3 = ? + 180
(23) . -7m - [3n - {(8m - (4n -10m)} = ?
11m - 5n
11n - 11m
11m - 7n
None of these
(24) . 1-[1- {1-(1 -1-1)}] =?
(25) . Solve: If x/y = 1/3, then x2+y2/x2-y2 =?
(26) . If a/3= b/4= c/7 then (a+b+c)/c= ?
(27) . A farmer divides his herd of cows among his four sons so that first son gets one half of the herd, the second son one-fourth, the third son one fifth and the fourth son 7 cows. the total number of cows in the herd is?
100
140
180
None of these
(28) . I paid 3/5 of a bill. If Rs. 400 of the bill is still due. what was the total amount of the bill?
Rs 1000
Rs 1200
Rs. 1500
None of these
(29) . A man has in all Rs. 640 in the denominations of one-rupee, five rupeee and ten rupee notes. the number of each type of notes are equal. What is the total member of notes he has?
(30) . Ali went to a shop to buy 50 kg of rice. He buys two varieties of rice which cost him Rs. 4.5 per kg and Rs.5 per kg. He appends a total of Rs. 240. What was the quality of cheaper rice bought by him?
20 kg
25 kg
30 kg
None of these