Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 240 · 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.🧩 Ananya is 12 years old. Aarav is 7 years older than Ananya. How old is Aarav? (a) 20 (b) 19 (c) 7 (d) not enough info
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
3. 3.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
4. 4.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
5. 5.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
7. 7.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no mango is sweet (d) no, check more
8. 8.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
9. 9.🧩 Ishaan bought 6 balls and a water bottle for ₹270 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹264 (c) ₹270 (d) ₹45
10. 10.🧩 Aarav is 12 years old. Arjun is 5 years older than Aarav. How old is Arjun? (a) not enough info (b) 5 (c) 17 (d) 18
11. 11.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
12. 12.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 6 PM
13. 13.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 8 PM (d) 5 PM
14. 14.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
15. 15.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
16. 16.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
17. 17.🧩 A box has 6 rows of apples, with 5 in each row. How many apples are in the box? (a) 35 (b) 11 (c) 30 (d) not enough info
18. 18.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) not enough info (b) 8 (c) 4 (d) 40
19. 19.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
20. 20.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 2 PM (c) not enough info (d) 6 PM
21. 21.🧩 Arjun bought 4 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹45 (c) ₹180 (d) ₹50
22. 22.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 80 (b) not enough info (c) 8 (d) 16
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Rohan is 11 years old. Aarav is 2 years older than Rohan. How old is Aarav? (a) 14 (b) 13 (c) 2 (d) not enough info
25. 25.🧩 Rohan bought 6 kites and a bag for ₹350 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹58 (c) ₹350 (d) ₹344
26. 26.🧩 A box has 8 rows of apples, with 4 in each row. How many apples are in the box? (a) 12 (b) 36 (c) 32 (d) not enough info
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” 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) True (b) False
29. 29.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
30. 30.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) that one dog barked (d) all dogs are mean
31. 31.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
32. 32.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 6 PM
33. 33.🧩 Ananya bought 2 pens for ₹70 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹40 (c) ₹35 (d) ₹70
34. 34.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 12 (b) 60 (c) 6 (d) not enough info
35. 35.🧩 Tara is 9 years old. Kabir is 4 years older than Tara. How old is Kabir? (a) not enough info (b) 13 (c) 14 (d) 4
36. 36.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
37. 37.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
38. 38.🧩 A box has 6 rows of apples, with 4 in each row. How many apples are in the box? (a) 10 (b) 24 (c) not enough info (d) 28
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
40. 40.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) not enough info (d) 3 PM

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