1.2 KiB
1.2 KiB
id | challengeType | title |
---|---|---|
5900f4021000cf542c50ff14 | 5 | Problem 148: Exploring Pascal"s triangle |
Description
1
1
1
1
2
1
1
3
3
1
1
4
6
4
1
1
5
10
10
5
1 1
6
15
20
15
6
1 However, if we check the first one hundred rows, we will find that only 2361 of the 5050 entries are not divisible by 7.
Find the number of entries which are not divisible by 7 in the first one billion (109) rows of Pascal's triangle.
Instructions
Tests
tests:
- text: <code>euler148()</code> should return 2129970655314432.
testString: 'assert.strictEqual(euler148(), 2129970655314432, "<code>euler148()</code> should return 2129970655314432.");'
Challenge Seed
function euler148() {
// Good luck!
return true;
}
euler148();
Solution
// solution required