Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 340 · 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.🧩 Nisha bought 2 mangoes and a cap for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹50 (b) ₹98 (c) not enough info (d) ₹100
2. 2.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) facts that support it (d) a guess
3. 3.🧩 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
4. 4.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
5. 5.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
6. 6.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) not enough info (b) 5 (c) 50 (d) 10
7. 7.🧩 Nisha is 12 years old. Aarav is 7 years older than Nisha. How old is Aarav? (a) 20 (b) 19 (c) 7 (d) not enough info
8. 8.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
10. 10.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) never see dogs (d) all dogs are mean
11. 11.🧩 Aarav is 6 years old. Ananya is older than Aarav. How old is Ananya? (a) 7 (b) not enough info (c) 11 (d) 8
12. 12.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) not enough info (b) 18 (c) 9 (d) 90
13. 13.🧩 Vihaan bought 3 balls and a lunch box for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹46 (b) ₹140 (c) ₹137 (d) not enough info
14. 14.🧩 Rohan is 10 years old. Saanvi is older than Rohan. How old is Saanvi? (a) 12 (b) 11 (c) not enough info (d) 15
15. 15.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
16. 16.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
17. 17.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
18. 18.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 5 PM
19. 19.🧩 A box has 7 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 14 (b) 49 (c) 56 (d) not enough info
20. 20.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
21. 21.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Meera is 12 years old. Rohan is older than Meera. How old is Rohan? (a) 14 (b) 13 (c) 17 (d) not enough info
23. 23.🧩 Rohan bought 2 pens and a lunch box for ₹100 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹50 (c) ₹98 (d) ₹100
24. 24.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 4 PM
25. 25.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
26. 26.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
27. 27.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
28. 28.🥭 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) yes, it is certain (c) no mango is sweet (d) no, check more
29. 29.🧩 Kabir is 12 years old. Nisha is 2 years older than Kabir. How old is Nisha? (a) 15 (b) not enough info (c) 2 (d) 14
30. 30.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 6 PM (d) 5 PM
31. 31.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Rohan bought 5 notebooks and a cap for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹125 (b) ₹130 (c) not enough info (d) ₹26
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
34. 34.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) what facts are given (d) your handwriting
35. 35.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
36. 36.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Tara is 11 years old. Diya is 4 years older than Tara. How old is Diya? (a) not enough info (b) 16 (c) 15 (d) 4
38. 38.🧩 Ananya is 12 years old. Nisha is 4 years older than Ananya. How old is Nisha? (a) 17 (b) 4 (c) not enough info (d) 16
39. 39.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 16 (c) 80 (d) 8
40. 40.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True

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