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একজন চাকরিজীবীর আয় ও ব্যয়ের অনুপার ২০ঃ ১৫ হলে, তার মাসিক সঞ্চয় আয়ের শতকরা কত অংশ?
ক ৩০%
খ ১৫%
গ ২০%
ঘ ২৫%
একটি ট্রান্সফরমারের প্রাইমারি ও সেকেন্ডারি তারের ঘূর্ণনের অনুপাত 20ঃ 1 এবং সেকেন্ডারিতে 20 omega রোধ লাগানো আছে। যদি প্রাইমারিতে 220 V প্রয়োগ করা হয় তাহলে এর মধ্যে বিদ্যুৎ প্রবাহ হবে-
ক 0.55 A
খ 27.5 mA
গ 27.5 A
ঘ 5.5 mA
The length of each side of square A is increased by 100 percent to make square B. Again the length of each side of square B is increased by 50 percent to make square C. By what percent is the area of square C greater than the sum of the areas of square A and B?
ক 75%
খ 80%
গ 85%
ঘ 90%
The length of each of square A is increased by 100 percent to make square B.Again the length of the each side of square B is increased by 50 peacent to make square C.By of the area df square A and B?
ক 75%
খ 80%
গ 85%
ঘ 90%
The last number which is a perfect square and is divisible by each of the numbers 16, 20 and 24, is :
ক 1600
খ 3600
গ 6400
ঘ 14400
The least perfect square,which is divisible by each 21, 36 and 66 is -
ক 213444
খ 214344
গ 214434
ঘ 231444
The least perfect square number divisible by 3, 4, 5, 6 and 8 is :
ক 900
খ 1200
গ 2500
ঘ 3600
A small square region inside a larger square is shaded. The diagonal of the larger square is three times the diagonal of the small square in length. What fraction of the area of the larger square is not shaded?
ক 1/9
খ 1/3
গ 2/3
ঘ 8/9
Sum of 4 consecutive even numbers is greater than three consecutive odd numbers by 81 . If the sum of the least odd and even numbers is 59 then find the sum of largest of odd and even numbers is 59 then find the sum of largest odd and even numbers.
ক 69
খ 53`
গ 65
ঘ 72
In a Class of 120 students numbered 1 to 120, all even numbered students opt for Physics , those whose numbers are divisible by 5 opt for Chemistry and those whose numbers are divisible by 7 opt for Math. How many opt for none of the three subject ?
ক 19
খ 41
গ 43
ঘ 51

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