Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 473 · 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.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
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.🥭 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) no mango is sweet (d) yes, it is certain
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Aarav is 7 years old. Tara is 8 years older than Aarav. How old is Tara? (a) 8 (b) 15 (c) not enough info (d) 16
6. 6.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
8. 8.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
9. 9.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
10. 10.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
11. 11.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Aarav is 10 years old. Ishaan is 2 years older than Aarav. How old is Ishaan? (a) 13 (b) not enough info (c) 12 (d) 2
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
15. 15.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
16. 16.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
17. 17.🧩 Aarav is 7 years old. Rohan is 2 years older than Aarav. How old is Rohan? (a) 10 (b) 9 (c) not enough info (d) 2
18. 18.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 3 PM
19. 19.🧩 A box has 7 rows of apples, with 4 in each row. How many apples are in the box? (a) 28 (b) 32 (c) not enough info (d) 11
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
21. 21.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Ishaan bought 6 notebooks for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) not enough info (c) ₹240 (d) ₹40
23. 23.🧩 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
24. 24.🧩 A box has 8 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 45 (b) not enough info (c) 40 (d) 13
25. 25.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
26. 26.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
27. 27.🧩 Diya is 7 years old. Ishaan is 8 years older than Diya. How old is Ishaan? (a) 15 (b) 8 (c) not enough info (d) 16
28. 28.🧩 Meera is 11 years old. Nisha is 9 years older than Meera. How old is Nisha? (a) 20 (b) 9 (c) 21 (d) not enough info
29. 29.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
30. 30.🧩 A box has 6 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 12 (b) 42 (c) not enough info (d) 36
31. 31.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
32. 32.🧩 Vihaan bought 4 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹45 (c) ₹180 (d) ₹50
33. 33.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
34. 34.🧩 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
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
36. 36.🧩 Arjun bought 3 notebooks and a lunch box for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) ₹36 (b) not enough info (c) ₹107 (d) ₹110
37. 37.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 7 PM
38. 38.🧩 Saanvi is 12 years old. Meera is 2 years older than Saanvi. How old is Meera? (a) 15 (b) 2 (c) 14 (d) not enough info
39. 39.🧩 Vihaan is 10 years old. Arjun is 9 years older than Vihaan. How old is Arjun? (a) 20 (b) not enough info (c) 19 (d) 9
40. 40.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion

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