Which number has prime factorisation (2^3\times3^2\times11)?
Step 1: Calculate (2^3=8) and (3^2=9). Step 2: (8\times9\times11=792). Step 3: Solve prime powers first, then multiply.
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SubjectsMathematics
अभाज्य गुणनखंडन
In Class 10 Mathematics, under the Real Numbers chapter, Prime Factorisation teaches students to express a composite number as a product of prime numbers. Students practise identifying prime factors and writing factorisations using multiplication and exponents. This foundational skill supports the Fundamental Theorem of Arithmetic and later work with HCF and LCM.
TOPIC PRACTICE
Up to 25 questions from this page. Select your focus, then start.
Step 1: Calculate (2^3=8) and (3^2=9). Step 2: (8\times9\times11=792). Step 3: Solve prime powers first, then multiply.
Step 1: Calculate (2^4=16). Step 2: (16\times3\times5\times7=1680). Step 3: When there are four factors, multiply smaller products in order.
Step 1: Calculate (3^3=27). Step 2: (2\times27\times5\times7=1890). Step 3: Finding the value of the power first makes calculation simple.
Step 1: Calculate (2^2=4) and (3^2=9). Step 2: (4\times9\times7\times11=2772). Step 3: First multiply 4 and 9, then include the remaining factors.
Step 1: Calculate (2^4=16) and (3^3=27). Step 2: (16\times27\times7=3024). Step 3: Simplify higher powers separately and multiply.
Step 1: (2^2=4) and (5^2=25). Step 2: (4\times3\times25\times7=2100). Step 3: Solving the powers first makes multiplication easier.
Step 1: Calculate (2^3=8) and (3^2=9). Step 2: (8\times9\times5\times7=2520). Step 3: First solve powers, then multiply by the remaining factors.
Step 1: In the final form, bases should be prime only. Step 2: In the first option, bases 2, 3, and 11 are prime. Step 3: 16, 9, 99, and 18 are composite, so they are not final forms.
Step 1: A final prime factorisation should not contain a composite factor like 25. Step 2: Since (25=5^2), (2^2\times25\times7) is not final form. Step 3: Change 25 into (5^2).
Step 1: Divide 4096 repeatedly by 2. Step 2: Twelve factors of 2 give (4096=2^{12}). Step 3: 64 and 16 are composite, so write (2^{12}) as the final prime form.
Step 1: Divide 6561 repeatedly by 3. Step 2: Eight factors of 3 give (6561=3^8). Step 3: 81 and 27 are composite, so write a power of 3 in the final form.
Step 1: Write (2197=13\times169). Step 2: (169=13^2), so (2197=13^3). Step 3: Since 169 is composite, write (13^3) in the final form.
Step 1: Write (6250=625\times10). Step 2: (625=5^4) and (10=2\times5), so (6250=2\times5^5). Step 3: Count the total power of 5 as 5.
Step 1: Write (5103=729\times7). Step 2: (729=3^6), so (5103=3^6\times7). Step 3: Do not leave 729 in the final form; write it as a power of 3.
Step 1: Write (5488=16\times343). Step 2: (16=2^4) and (343=7^3), so (5488=2^4\times7^3). Step 3: Convert 16 and 343 into prime powers.
Step 1: Calculate (2^4=16) and (3^2=9). Step 2: (16\times9\times11=1584). Step 3: Solve powers first and then multiply.
Step 1: Calculate (2^2=4) and (3^3=27). Step 2: (4\times27\times11=1188). Step 3: Finding the value of powers first is the right method.
Step 1: Calculate (3^3=27) and (5^2=25). Step 2: (2\times27\times25=1350). Step 3: Simplifying the two powers first makes multiplication easy.
Step 1: Calculate (2^2=4) and (3^2=9). Step 2: (4\times9\times7\times11=2772). Step 3: Move step by step while multiplying.
Step 1: Write (4200=42\times100). Step 2: (42=2\times3\times7) and (100=2^2\times5^2), so (4200=2^3\times3\times5^2\times7). Step 3: Count the powers of 2 and 5 carefully.
Step 1: Write (4620=42\times110). Step 2: (42=2\times3\times7) and (110=2\times5\times11), so (4620=2^2\times3\times5\times7\times11). Step 3: Since 2 appears twice, write (2^2).
Step 1: Write (5400=54\times100). Step 2: (54=2\times3^3) and (100=2^2\times5^2), so (5400=2^3\times3^3\times5^2). Step 3: Break both 54 and 100 completely.
Step 1: Calculate (2^2=4). Step 2: (4\times3\times5\times7\times11=4620). Step 3: When there are many factors, multiply in pairs.
Step 1: Divide 8192 repeatedly by 2. Step 2: Thirteen factors of 2 give (8192=2^{13}). Step 3: 64 and 16 are composite, so write the power of 2 in final prime form.
Step 1: In prime factorisation, every final factor must be prime. Step 2: (18=2\times3^2) and (100=2^2\times5^2), so both are composite. Step 3: (18\times100) must be changed further into (2^3\times3^2\times5^2).
QUIZ COMPLETE