Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 489 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Arjun bought 2 pens for ₹30 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹30 (c) ₹20 (d) ₹15
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Meera is 6 years old. Kabir is 4 years older than Meera. How old is Kabir? (a) 4 (b) not enough info (c) 11 (d) 10
4. 4.🧩 Arjun is 8 years old. Kabir is older than Arjun. How old is Kabir? (a) 13 (b) 10 (c) not enough info (d) 9
5. 5.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Meera is 9 years old. Aarav is 9 years older than Meera. How old is Aarav? (a) 19 (b) not enough info (c) 9 (d) 18
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
8. 8.🧩 A box has 4 rows of apples, with 6 in each row. How many apples are in the box? (a) 30 (b) 10 (c) 24 (d) not enough info
9. 9.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
10. 10.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 6 PM
11. 11.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 6 PM
12. 12.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Aarav is 8 years old. Tara is older than Aarav. How old is Tara? (a) 10 (b) 9 (c) 13 (d) not enough info
14. 14.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
15. 15.🧩 Arjun is 11 years old. Tara is older than Arjun. How old is Tara? (a) 16 (b) 13 (c) not enough info (d) 12
16. 16.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
17. 17.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Ananya is 12 years old. Arjun is 4 years older than Ananya. How old is Arjun? (a) not enough info (b) 17 (c) 4 (d) 16
19. 19.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
22. 22.🧩 Tara is 11 years old. Nisha is older than Tara. How old is Nisha? (a) 13 (b) 16 (c) not enough info (d) 12
23. 23.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
25. 25.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) yes, it is certain (d) no mango is sweet
26. 26.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
27. 27.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
28. 28.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
29. 29.🧩 A box has 7 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 64 (b) 56 (c) 15 (d) not enough info
30. 30.🧩 Saanvi bought 4 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹120 (b) ₹35 (c) ₹30 (d) not enough info
31. 31.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) 7 PM (d) not enough info
32. 32.🧩 Rohan bought 3 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹150 (c) ₹50 (d) ₹55
33. 33.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
34. 34.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 3 PM
35. 35.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Saanvi bought 4 notebooks and a cap for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹62 (c) ₹250 (d) ₹246
37. 37.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
38. 38.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
39. 39.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 3 PM
40. 40.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False

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