Solve the following riddle:
I am a number,
Tell my identity!
Take me seven times over
And add a fifty!
To reach a triple century
You still need forty!

Solve the following riddles,you may yourself construct such riddles. Who am I? Tell me who I am I shall give a pertty clue! You will get me back If you take me out of twenty two!?

Solve the following riddles,you may yourself construct such riddles. Who am I? I am a special number Take away from me a six! A whole cricket team You will still be able to fix!.

Solve the following riddles,you may yourself construct such riddles. Who am I? Go around a square Counting every corner Thrice and no more! Add the count to me To get exactly thirty four!.

Solve the following riddles,you may yourself construct such riddles. Who am I? For each day of the week Make an upcount from me If you make no mistake You will get twenty three!.

Estimating the following numbers should be interesting. The number tells you why our eye can never count photons, even in barely detetable light. The number of photons entering the pupil of our eye per second corresponding to the minimum intensity of white light that we humans can perceive (~10^-10 Wm^-2) . Take the area of the pupil to be about 0.4 cm^2 , and the average frequency of white light to be about 6 xx 10^14 Hz .

When we add zero to any whole number we get the same whole number Zero is called the additive identity for whole numbers .Is it an additive identity again for integers also Observe the following and fill in the blanks (i) (-8)+0=-8 (ii) 0+(-8)=-8 (iii) (-23) +0= (iv) 0+(-37)=-37 (v) 0+(-59)=... (vi) 0+...=-43 (vii) -61 +....=-43 (vii) -61 +...=-61 (viii) ..+0= ..... The above examples shows that zero is an additive identity for integers . you can verify it by a adding zero to any other five integers . In general , for any integer a , a+0=0+a=a

Set up equations and solve them to find the unknown numbers in the following cases: Add 4 to eight times a number, you get 60.