If * is defined for all positive real numbers a and b by a*b=ab/(a+b), then 10*2=?
unchanged
decreased by 4%
increases by 4%
increases by 5%
tk. 156
tk. 120
tk. 136
tk. 160
In each expression below , N represents a negative integer . Which expression could have a negative value?
If the length of rectangle B and the width of rectangle A is one-half the width of rectangle B, what is the ratio of the area of rectangle A to the area of rectangle B?
log36/log6 ___
congruent triangles
triangles of equal area
isosceles triangle
right triangle
How many cases do you need if you have to pack 112 pairs of shoes into cases that each hold 28 shoes ?
২৩
21
22
২০
siddik has a new set of golf clubs . using a club 8,7, and 6 ball travels an average distance of 100 m, 108 m, 114 m, respectively , How far will the ball go if he uses a club 5 ?
৪৬. If sin A + sin2A=1, then the value of the expression cos2A+cos4A is--
How many integers from 1 to 1000 are divisible by 30 but not by 16 ?
6
17
১৯
If 1 -2x ≤ 3, then ___
The day after the day after tomorrow is 4 days before Moday . What day is it today?
If 6121135 represents 'flame' then 21215120 represents __
At the end of a banquet 10 people shake hands with each other . How many handshakes will be in total?
In a crime , three suspects X, Y, and Z were caught and questioned . Each person said, "One of the other two stole it . I did not do it. " Later on the police found out that Z was lying and these was only one thief . Who was the thief?
which of the following can be arranged into a 5 -letter English word? a.HRGST B. RILSA C. TOOMT D. WQRGS