গণিত : মার্কস ৫৫
1. Answer to the following questions in short. 1–10=10
a. A triangle at lest has ———-.
b. 1 2 – diameter =?
c. The semicircular angle is always—-.
d. Supplementary angle of an acute angle is———.
e. If x+ 1x =2, then what is the root of the equation?
f. What is the sum when Ö3 is added with Ö3?
g. If a = 2, b = 12 then a+ 1b = ?
h. What is the 4th term of the
series 1+14 + 116 +---- ?
i. What is the value of 0.1–0.01–0.001 =?
0.2–0.02–0.002
j. Interest–100 =?
rate–time
2. Solve the following problems : 4x4=16
a. In how many years the interest on Tk 255 at 5% simple interest will be equal to the Interest on Tk 250 in 6 years at 3% simple interest?
b. Mr. roy and joy can do a work together in 12 days. Mr. roy alone can do the same work in 20 days. How many days will Mr. joy take to complete the work?
c. 30 men can build a house in 25 days. After 10 days, work could not be continued for 5 days due to bad weather. How many more men have to be employed to finish the work in time?
d. The difference of two number is 25. If the 4 times of the greater number is equal to the 5 times of the smaller number. What is the ratio of two number?
3. Answer in short : 2x5=10
a. The length of a room is 1 12
times of its breadth. If its area is 216 square feet, what is the perimeter?
b. What is the sum of 1+2+3+ —+100?
c. The product of two numbers is 648. If the HCF of the two numbers is 9, what is their L.C.M?
d. Find the square of the number 990 with proper formulae.
e. a+b=5 and a-b=2. Find out the value of 4ab.
4. Answer the following questions :
3 –3=9
a. a2-Ö3a+1=0 then a2+12a =?
b. Sum of the three consecutive odd natural numbers is 27. Find the number?
c. -2a-[-4b-{6c-(-8a-10b+12c)}]
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