Lesson 7 of 14
How big a lakh really is
Show on a big screenA page holds a grid of dots, 100 across and 100 down. That is 10,000 dots. How many pages make a lakh?
Step 1 of 4
- One page: 100 × 100 dots = 10,000.
- A lakh needs 10 such pages.
- A crore needs 1,000 pages — too many to draw!
- One dot a second: a lakh takes about a day.
The rule
A lakh needs ten pages of 10,000 dots. A crore needs a thousand pages. Check: 10 × 10,000 = 1,00,000. And 1,000 × 10,000 = 1,00,00,000.
You can also see the size with time. Count one thing each second. A day has 24 hours. An hour has 60 minutes, a minute 60 seconds. So a day has 24 × 60 × 60 = 86,400 seconds. A lakh of seconds is a little more than a day. A crore is 100 lakh. So a crore of seconds is 100 times that: about 116 days.
Tap ten tiles in the lab. Switch between a lakh and a crore.
Loading lab…
Try the lab to finish this lesson.