If * is defined for all positive real numbers a and b by a*b=ab/(a+b), then 10*2=?
If the langth of a rectangle is increased by 20% and width is decreased by 20% what is the change in area of rectangle ?
unchanged
decreased by 4%
increases by 4%
increases by 5%
The dimensions of a box are 2,3 and 4 meters . the cost of painting the outer sides of the box at the rate of tk. 3 per square meter is ___
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 ___
a median of a triangle divides it into two ___
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 ?
In a row in the theatre the seats are numbered consecutively from T1 to T50. Sumon is sitting in seat T17 and Sajib is sitting in seat T39. How many seats are there between us?
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 ?
Which number logically follows the sequence ? 4 6 9 6 14 6 ........
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