math feb 29

answer is :- 1. d – Given, 1/3+1/2+1/x=4 or 2+3+6/x=24 (multiplying each by L.C.M of 2 &3=6)

or 6/x=24-5=19 or 6/19=x (This method may help you to save your time)

2. b – Eita kora lagbe kar kar? Plz don't be ashamed, share everything

3. a – No even number in this range.

4. d – Er explanation apnara first comment korun.

5. b – justify divisibility by applying our given previous rules.

6. c – 192/64=3, Square root of 2, .64646464....

7. d – 2.09 can be written 2.1 as tenth

8. b - (root 3) *(root 3)*(root 3)=3(root 3) & (root 3)+(root 3)+(root 3)=3(root 3)

9. b – very sorry for those who answer d. Be stable (don't hurry) > the only prime number divisible by 7 is 7. That is why I am looking for your comment with explanation.

10. d - Given, S=4N/5, J=1/3 of S=1/3*4N/5=4N/15 So N:S:J=1:4N/5:4N/15=15:12:4 (multiplying by 15 that is L.C.M.)