Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 44 · 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.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
2. 2.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Rohan bought 5 balls and a bag for ₹270 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹54 (c) ₹265 (d) ₹270
4. 4.🧩 Kabir bought 2 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹90 (c) ₹45 (d) ₹50
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
6. 6.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
7. 7.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
8. 8.🧩 Arjun bought 5 balls and a cap for ₹165 in all. Each ball cost the same. What did one ball cost? (a) ₹160 (b) ₹33 (c) not enough info (d) ₹165
9. 9.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
10. 10.🧩 Arjun is 11 years old. Diya is 5 years older than Arjun. How old is Diya? (a) 17 (b) not enough info (c) 16 (d) 5
11. 11.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
13. 13.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 50 (b) 5 (c) not enough info (d) 10
14. 14.🧩 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
15. 15.🧩 Aarav bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹20 (d) ₹15
16. 16.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 3 PM (d) 4 PM
17. 17.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 60 (b) not enough info (c) 6 (d) 12
18. 18.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) 7 PM (d) not enough info
19. 19.🧩 Kabir bought 4 mangoes for ₹240 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) not enough info (c) ₹240 (d) ₹60
20. 20.🧩 Arjun bought 5 pens for ₹175 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹35 (c) ₹175 (d) ₹40
21. 21.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
22. 22.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
23. 23.🧩 Diya bought 3 kites and a water bottle for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹137 (b) ₹140 (c) not enough info (d) ₹46
24. 24.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
25. 25.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
26. 26.🧩 Nisha bought 6 notebooks and a water bottle for ₹200 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹200 (c) ₹33 (d) ₹194
27. 27.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 6 (b) not enough info (c) 12 (d) 60
28. 28.🧩 A box has 4 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 20 (b) 9 (c) 25 (d) not enough info
29. 29.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
30. 30.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
31. 31.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking the whole class (d) asking your pet
32. 32.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
33. 33.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
34. 34.🥭 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 mango is sweet (c) no, check more (d) yes, it is certain
35. 35.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) not enough info (b) 6 (c) 60 (d) 12
36. 36.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
37. 37.🐕 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
38. 38.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
39. 39.🧩 Vihaan is 6 years old. Kabir is older than Vihaan. How old is Kabir? (a) 11 (b) 7 (c) not enough info (d) 8
40. 40.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence

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