how to solve this .....plz smbody hel 
:
i found this on mgamat...
:!:
quite a tricky question here ...guys.... :!:
:i found this on mgamat...
:!:
quite a tricky question here ...guys.... :!:
for these type of q we need to know the repetition
7^1=7 when div by 100 rem=7
7^2=49 rem=49
7^3=343 rem=43
7^4=2401 rem=1
7^5=16807 rem=7
hence the rem is repeating after every 4th power
7^10 (div 10 by 4 rem is 2 ; so 7^10 is a no. which will have same rem as 7^2 i.e 49)
ans is 49
