Divisibility Rule
Divisibility Rule
- What is the divisibility by 2 Rule?
- Even numbers are multiples of 2. A number is even if ends in 0,2,4,6, or 8.
- What is the divisibility by 3 rule?
- A number is divisible by 3 if the sum of its digits is divisible by 3.
- 372, for instance, is divisible by 3 since sum of its digits (3+7+2) is 12. And 12 is divisible by 3.
- What is the divisibility by 4 rule?
- A number is divisible by 4 if the number\'s last two digits are divisible by 4
- 9,312, for instance, is divisible by 4 since its last 2 digits are 12. And 12 is divisible by 4.
- What is the divisibility by 5 rule?
- A number is divisible by 5 if its last digit is a 0 or 5.
- What is the divisibility by 6 rule?
- Since 6 is a multiple of 2 and 3, the rules for divisibility by 6 are a combination of the rule for 2 and the rule for 3.
- Divisibility by 8 Rule
- A number passes the test for 8 if the last three digits form a number is divisible 8.
- Divisibility by 9 Rule
- A number is divisible by 9 if the sum of the digits are evenly divisible 9.
- Divisibility by 10 Rule
- A number passes the test for 10 if its final digit is 0
Formula : .
Train Speed = Distance / Time.
Points to Remember .
To change km/hr into m/sec, we need to multiply it by 5 / 18. .
Example:.
90 km/hr means.
90 x 5 / 18.
= (5 x 5 ).
= 25 m/sec.
And if we need to convert m/sec into km/hr, we multiply it by 18 / 5.
Example:.
90 m/sec means.
90 x 18 / 5.
= ( 18 x 18 ).
= 324 km/hr.
Time taken by a train of length l meters to pass a pole or standing man or a signal post is equal to the time taken by the train to cover l meters.
Time taken by a train of length l meters to pass a stationary object of length b meters is the time taken by the train to cover (l + b) meters.
Suppose two trains or two objects bodies are mo...
1) ഇന്ത്യയിലെത്തിയ വിദേശികൾ അവർ വന്ന ക്രമത്തിൽ = PDEF .
Portagese, Dutch,English, French.
2) വൈറ്റമിനുകൾ.
കൊഴുപ്പിൽ ലയിക്കുന്നവ= ADEK.
ജലത്തിൽ ലയിക്കുന്നവ = BC.
3) കൂടുതൽ States അധികാരപരിധിയിലുള്ള ഹൈകോടതി = ഗുഹാവതി. ഏതൊക്കെ?.
States Code = MAAN ( മിസോറം,അരുണാചൽപ്രദേശ്, അസം,നാഗാലാൻഡ് ).
4) യുദ്ധങ്ങൾ അവസാനിപ്പിച്ച സന്ധികൾ.
കർണാട്ടിക് യുദ്ധങ്ങൾ...
N = the number of terms .
S = the sum of the numbers in the set.
Average = S/N .
For example.
The marks of a student in five subjects are 96, 94, 92, 87, and 81, then what is the average score of the student?.
N = 5.
S = 96 + 94 + 92 + 87 + 81 = 450.
A = 450/5 = 90.
Another type questions .
1). There are 36 boys and 44 girls in a class. The average score of boys is 40 and girls are 35. Then what will be the average mark? .
Total mark of 36 boys = 36 x 40 = 1440.
Total mark of 44 girls = 35 x 44 = 1540.
Total mark of 80 Students = 1440 + 1540 = 2980 .
Average mark of the class = (2980 / 80).
...
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